New push block, clamps add safety in shop
Microjig dovetail clamps

Microjig’s new Grr-rip clamps combine fast-action one-handed clamps with dovetail bars for a versatile clamping system using any ½-inch 14-degree dovetail slot.

Microjig is famous for clever shop aids, most developed by company founder, Henry Wang. Recently I had the chance to try out two of the company’s latest offerings: a push block and some clamps.

The Microjig GRR-Ripper 3D push block is the latest in Microjig’s family of push blocks. The Grr-rip clamp is a new work-holding design. They both offer lots of interesting features.

Microjig GRR-Ripper push block
Microjig’s GRR-Ripper 3D push block use two fixed rubber-tipped legs and one adjustable center leg to safely grip wood sliding through the table saw. An adjustable outrigger adds stability.

GRR-Ripper 3D push block
I’ve used lots of different push blocks from Microjig and other companies, as well as made my own push blocks from scrap wood. Frankly, some of the manufactured push blocks have more features than benefits. They are too complicated and require too many adjustments. I was pleased to see the GRR-Ripper 3D model is simple and straightforward.

With a comfortable and secure top handle, this push block has two narrow rubber-coated side legs and one wider adjustable leg in the middle. There is also an adjustable outrigger to help stabilize the push block. An accessory called the SafeRip Kit that came with my sample, adds rulers and a transparent cursor to make adjusting the center leg of the push block even easier.

Grr-rip clamps
These clamps combine the fast action of common one-handed squeeze-adjust clamps with a dovetail-shaped bar that fits in any worktable with a ½-inch dovetail slot for an instantquick-a ction vertical hold-down device. There are non-marring clamping surfaces and up to 150-pounds of clamping force.

How do they work?
With just two adjustments — the outrigger and the center leg — the GRR-Ripper 3D is fast and easy to use, adding a significant measure of safety in tablesaw ripping operations.

The Grr-rip clamps combine with dovetail slots for very secure work holding. You can easily add appropriate dovetail slots to sleds, fences, and other work fixtures or even workbenches to make use of these clamps all over your shop.

Microjig's new Grr-rip clamps won't be available until the fall, but the GRR-Ripper 3D push blocks are available now. You can learn more about these and other Microjig products at


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About the author
William Sampson

William Sampson is a lifelong woodworker, and he has been an advocate for small-scale entrepreneurs and lean manufacturing since the 1980s. He was the editor of Fine Woodworking magazine in the early 1990s and founded WoodshopBusiness magazine, which he eventually sold and merged with CabinetMaker magazine. He helped found the Cabinet Makers Association in 1998 and was its first executive director. Today, as editorial director of Woodworking Network and FDMC magazine he has more than 20 years experience covering the professional woodworking industry. His popular "In the Shop" tool reviews and videos appear monthly in FDMC.